Question for loosing weight when being overweight

[taaa]

This is NOT my problem my mate is kind off overweight and he's hitting the gym for 2 weeks now.
He seen some decent results already.
My question would be what would be the best way to ONLY get rid off the fat without building any muscle.
Since you can't build any muscle while cutting and bulking at around 30% bodyfat would be stupid.
He does cardio once a day for 40-60 mins but I think hes almost starving him to death not eating properly.
What would a diet look like in that case?
Regular 40/40/20 diet with 500 calories below maintenance?
Help would me appreciated.
I don't have any stats tho I know hes 1,90cm and I would guess that he's around 110 kilos.
His primary goal is to loose fat muscle gains after

[JohnnyVegas]

I lost a lot of fat on a 60/20/20 diet. I started cutting at 2000 calories and eventually went down to 1800 when I plateaued.

He should lift, working every body part once a week. Cardio as many days as he can stand.

I started at 36% body fat (and had been higher in the past) so I know he can do it.

[taaa]

ya I told him to do SS aswell
thanks for the answer

[RaginCajun]

ya I told him to do SS aswell
thanks for the answer

Now he just needs to listen!